diff options
Diffstat (limited to 'src/include/cpu')
| -rw-r--r-- | src/include/cpu/x86/smm.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/include/cpu/x86/smm.h b/src/include/cpu/x86/smm.h index 00a8c7a218..302873f893 100644 --- a/src/include/cpu/x86/smm.h +++ b/src/include/cpu/x86/smm.h @@ -379,6 +379,14 @@ int __attribute__((weak)) mainboard_io_trap_handler(int smif); void southbridge_smi_set_eos(void); +#if CONFIG_SMM_MODULES +void cpu_smi_handler(void); +void northbridge_smi_handler(void); +void southbridge_smi_handler(void); +void mainboard_smi_gpi(u16 gpi_sts); +int mainboard_smi_apmc(u8 data); +void mainboard_smi_sleep(u8 slp_typ); +#else void __attribute__((weak)) cpu_smi_handler(unsigned int node, smm_state_save_area_t *state_save); void __attribute__((weak)) northbridge_smi_handler(unsigned int node, smm_state_save_area_t *state_save); void __attribute__((weak)) southbridge_smi_handler(unsigned int node, smm_state_save_area_t *state_save); @@ -386,10 +394,14 @@ void __attribute__((weak)) southbridge_smi_handler(unsigned int node, smm_state_ void __attribute__((weak)) mainboard_smi_gpi(u16 gpi_sts); int __attribute__((weak)) mainboard_smi_apmc(u8 data); void __attribute__((weak)) mainboard_smi_sleep(u8 slp_typ); +#endif /* CONFIG_SMM_MODULES */ #if !CONFIG_SMM_TSEG void smi_release_lock(void); #define tseg_relocate(ptr) +#elif CONFIG_SMM_MODULES +#define tseg_relocate(ptr) +#define smi_get_tseg_base() 0 #else /* Return address of TSEG base */ u32 smi_get_tseg_base(void); @@ -400,4 +412,72 @@ void tseg_relocate(void **ptr); /* Get PMBASE address */ u16 smm_get_pmbase(void); +#if CONFIG_SMM_MODULES + +struct smm_runtime { + u32 smbase; + u32 save_state_size; + /* The apic_id_to_cpu provides a mapping from APIC id to cpu number. + * The cpu number is indicated by the index into the array by matching + * the deafult APIC id and value at the index. The stub loader + * initializes this array with a 1:1 mapping. If the APIC ids are not + * contiguous like the 1:1 mapping it is up to the caller of the stub + * loader to adjust this mapping. */ + u8 apic_id_to_cpu[CONFIG_MAX_CPUS]; +} __attribute__ ((packed)); + +typedef void (*smm_handler_t)(void *arg, int cpu, + const struct smm_runtime *runtime); + +#ifdef __SMM__ +/* SMM Runtime helpers. */ + +/* Entry point for SMM modules. */ +void smm_handler_start(void *arg, int cpu, const struct smm_runtime *runtime); + +/* Retrieve SMM save state for a given CPU. WARNING: This does not take into + * account CPUs which are configured to not save their state to RAM. */ +void *smm_get_save_state(int cpu); + +#else +/* SMM Module Loading API */ + +/* Ths smm_loader_params structure provides direction to the SMM loader: + * - stack_top - optional external stack provided to loader. It must be at + * least per_cpu_stack_size * num_concurrent_stacks in size. + * - per_cpu_stack_size - stack size per cpu for smm modules. + * - num_concurrent_stacks - number of concurrent cpus in handler needing stack + * optional for setting up relocation handler. + * - per_cpu_save_state_size - the smm save state size per cpu + * - num_concurrent_save_states - number of concurrent cpus needing save state + * space + * - handler - optional handler to call. Only used during SMM relocation setup. + * - handler_arg - optional argument to handler for SMM relocation setup. For + * loading the SMM module, the handler_arg is filled in with + * the address of the module's parameters (if present). + * - runtime - this field is a result only. The SMM runtime location is filled + * into this field so the code doing the loading can manipulate the + * runtime's assumptions. e.g. updating the apic id to cpu map to + * handle sparse apic id space. + */ +struct smm_loader_params { + void *stack_top; + int per_cpu_stack_size; + int num_concurrent_stacks; + + int per_cpu_save_state_size; + int num_concurrent_save_states; + + smm_handler_t handler; + void *handler_arg; + + struct smm_runtime *runtime; +}; + +/* Both of these return 0 on success, < 0 on failure. */ +int smm_setup_relocation_handler(struct smm_loader_params *params); +int smm_load_module(void *smram, int size, struct smm_loader_params *params); +#endif /* __SMM__ */ +#endif /* CONFIG_SMM_MODULES */ + #endif |